Hello and welcome to live coverage of free practice two ahead of the Singapore GP.

Button is back into the pits. He's made it back cosniderably quicker than his car.

Kobayashi meets the kerb at the Singapore Sling chicane - without having had an accident, he's been involved in a few close shaves this session.

Massa loses a little of his advantage, but still goes quickest with a 1:47.120.

Massa quickest of everyone in the first sector - and extends that advantage in the second...

Senna up to seventh in a 1:50.241 - the first option tyre time, still some way behind the Red Bulls. Will he get a second, quicker lap out of those tyres?

Halfway through the session - it's been all Red Bull so far - can anyone make a dent on them in qualifying mode?

Senna, Massa amongst the first riders to put on the quick tyres.

We may well see the times start to dip - the supersoft tyres are going to get an outing or two.

Word from Force India is that Di Resta has been struck with a hydraulic problem. So that's delays for all three British drivers. Yellow flags are no longer flying.

All a bit subdued as Jenson hitches a motorbike lift back to the pits. The stewards, meanwhile, are trying to work out how to get the car off track and back to McLaren...

Button gets out of the car and walks away. He's far from happy. The car will have to be removed by the cranes, and is that the end of his session?

'It's not working', Jenson tells his engineers. That's not good news.

Jenson Button has had an incident - he's run wide at turn 14 and is facing the barrier - he needs to reverse out of trouble, but there's no room and his brakes are smoking...

Hamilton down to 1:48.390, but still more than a second behind Vettel. The yellow flags are out...

Di Resta set a decent time to sit 11th on his first run, but his seocnd run is held up as his mechanics remove the floor of his car to investigate a problem he reported.

Singapore really does show up the difference between top and bottom - Liuzzi has put in his best lap of 1:57.292 , but his HRT is almost 10 seconds down on Vettel.

Hamilton's car can't be in too poor shape - he gets around in a 1:48.906 to leap up to third in the standings.

Both Red Bull drivers are back out on track. Nobody anywhere near them at the moment.

Kobayashi's tyre meets the wall as well! He's not the first to do it this session, but again he gets away with it - just.

Whoops - Hamilton pushing too hard and runs straight over the top of the kerb at turn 14, with things flying out from under the car. Hamilton backs off.

Hamilton just under two-tenths slower than Vettel through the first sector - decent pace, and he's the only one of the top drivers running at the moment.